<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>登录1</title>
		<style>
			* {
				margin: 0;
				padding: 0;
				box-sizing: border-box;
			}

			/* 动态背景 */
			@keyframes move {
				100% {
					transform: translate3d(0, 0, 1px) rotate(360deg);
				}
			}

			.background {
				position: fixed;
				width: 100vw;
				height: 100vh;
				top: 0;
				left: 0;
				background: #3E1E68;
				overflow: hidden;
			}

			.background span {
				width: 20vmin;
				height: 20vmin;
				border-radius: 20vmin;
				backface-visibility: hidden;
				position: absolute;
				animation: move;
				animation-duration: 45;
				animation-timing-function: linear;
				animation-iteration-count: infinite;
			}


			.background span:nth-child(0) {
				color: #FFACAC;
				top: 90%;
				left: 47%;
				animation-duration: 8s;
				animation-delay: -17s;
				transform-origin: 2vw 17vh;
				box-shadow: -40vmin 0 5.494502440636581vmin currentColor;
			}

			.background span:nth-child(1) {
				color: #FFACAC;
				top: 31%;
				left: 5%;
				animation-duration: 40s;
				animation-delay: -14s;
				transform-origin: -5vw -14vh;
				box-shadow: -40vmin 0 5.192195104974926vmin currentColor;
			}

			.background span:nth-child(2) {
				color: #FFACAC;
				top: 18%;
				left: 62%;
				animation-duration: 20s;
				animation-delay: -5s;
				transform-origin: -18vw -12vh;
				box-shadow: 40vmin 0 5.72205756381233vmin currentColor;
			}

			.background span:nth-child(3) {
				color: #FFACAC;
				top: 71%;
				left: 45%;
				animation-duration: 30s;
				animation-delay: -2s;
				transform-origin: -4vw -20vh;
				box-shadow: -40vmin 0 5.303503038071778vmin currentColor;
			}

			.background span:nth-child(4) {
				color: #E45A84;
				top: 90%;
				left: 38%;
				animation-duration: 15s;
				animation-delay: -48s;
				transform-origin: 7vw -9vh;
				box-shadow: -40vmin 0 5.882238754040052vmin currentColor;
			}

			.background span:nth-child(5) {
				color: #583C87;
				top: 34%;
				left: 32%;
				animation-duration: 30s;
				animation-delay: -36s;
				transform-origin: -6vw -15vh;
				box-shadow: 40vmin 0 5.183333217256063vmin currentColor;
			}

			.background span:nth-child(6) {
				color: #583C87;
				top: 25%;
				left: 41%;
				animation-duration: 21s;
				animation-delay: -47s;
				transform-origin: -10vw -5vh;
				box-shadow: 40vmin 0 5.345257098222438vmin currentColor;
			}

			.background span:nth-child(7) {
				color: #E45A84;
				top: 16%;
				left: 39%;
				animation-duration: 30s;
				animation-delay: -33s;
				transform-origin: -15vw 3vh;
				box-shadow: -40vmin 0 5.693872337330205vmin currentColor;
			}

			.background span:nth-child(8) {
				color: #583C87;
				top: 42%;
				left: 55%;
				animation-duration: 46s;
				animation-delay: -50s;
				transform-origin: -6vw 25vh;
				box-shadow: 40vmin 0 5.588315610213253vmin currentColor;
			}

			.background span:nth-child(9) {
				color: #E45A84;
				top: 78%;
				left: 25%;
				animation-duration: 44s;
				animation-delay: -21s;
				transform-origin: -4vw -12vh;
				box-shadow: -40vmin 0 5.82170170819547vmin currentColor;
			}

			.background span:nth-child(10) {
				color: #E45A84;
				top: 73%;
				left: 77%;
				animation-duration: 41s;
				animation-delay: -40s;
				transform-origin: 21vw -11vh;
				box-shadow: -40vmin 0 5.838449416658446vmin currentColor;
			}

			.background span:nth-child(11) {
				color: #E45A84;
				top: 48%;
				left: 81%;
				animation-duration: 33s;
				animation-delay: -42s;
				transform-origin: 6vw 19vh;
				box-shadow: 40vmin 0 5.848850560573668vmin currentColor;
			}

			.background span:nth-child(12) {
				color: #E45A84;
				top: 77%;
				left: 7%;
				animation-duration: 25s;
				animation-delay: -1s;
				transform-origin: 15vw 24vh;
				box-shadow: -40vmin 0 5.800039290361969vmin currentColor;
			}

			.background span:nth-child(13) {
				color: #E45A84;
				top: 77%;
				left: 38%;
				animation-duration: 51s;
				animation-delay: -40s;
				transform-origin: -1vw -13vh;
				box-shadow: -40vmin 0 5.876822672246133vmin currentColor;
			}

			.background span:nth-child(14) {
				color: #583C87;
				top: 58%;
				left: 98%;
				animation-duration: 7s;
				animation-delay: -1s;
				transform-origin: -19vw -20vh;
				box-shadow: -40vmin 0 5.622075629639948vmin currentColor;
			}

			.background span:nth-child(15) {
				color: #583C87;
				top: 79%;
				left: 31%;
				animation-duration: 39s;
				animation-delay: -46s;
				transform-origin: 14vw 21vh;
				box-shadow: 40vmin 0 5.022352355698978vmin currentColor;
			}

			.background span:nth-child(16) {
				color: #E45A84;
				top: 41%;
				left: 74%;
				animation-duration: 37s;
				animation-delay: -4s;
				transform-origin: -19vw 3vh;
				box-shadow: 40vmin 0 5.049960684696969vmin currentColor;
			}

			.background span:nth-child(17) {
				color: #583C87;
				top: 56%;
				left: 34%;
				animation-duration: 26s;
				animation-delay: -35s;
				transform-origin: -16vw -7vh;
				box-shadow: -40vmin 0 5.11253385954465vmin currentColor;
			}

			.background span:nth-child(18) {
				color: #583C87;
				top: 84%;
				left: 2%;
				animation-duration: 14s;
				animation-delay: -39s;
				transform-origin: -10vw -6vh;
				box-shadow: 40vmin 0 5.903761483531039vmin currentColor;
			}

			.background span:nth-child(19) {
				color: #E45A84;
				top: 61%;
				left: 39%;
				animation-duration: 21s;
				animation-delay: -36s;
				transform-origin: 14vw 9vh;
				box-shadow: 40vmin 0 5.448311817969409vmin currentColor;
			}

			.background span:nth-child(20) {
				color: #E45A84;
				top: 33%;
				left: 5%;
				animation-duration: 8s;
				animation-delay: -7s;
				transform-origin: 4vw 2vh;
				box-shadow: 40vmin 0 5.013421190075091vmin currentColor;
			}

			/* 动态背景 */

			body {
				height: 100vh;
				background-color: aquamarine;
			}

			.Box {
				position: fixed;
				top: 50%;
				left: 50%;
				transform: translate(-50%, -50%);
				width: 320px;
				background-color: rgba(0, 0, 0, 0.24);
				border-radius: 6px;
				padding: 20px 32px;
			}

			h3 {
				font-size: 22px;
				color: #fff;
				text-align: center;
				margin-bottom: 40px;
				font-weight: 500;
				letter-spacing: 5px;
			}

			input {
				width: 100%;
				height: 35px;
				border: 1px solid #fff;
				background-color: transparent;
				padding-left: 10px;
				font-size: 12px;
				color: #fff;
				margin-bottom: 20px;
				outline: none;
				border-radius: 5px;
			}

			input::placeholder {
				color: #fff;
			}

			.yzmBox {
				display: flex;
				justify-content: flex-start;
			}

			.yzmBox input {
				width: 70%;
				border-top-right-radius: 0;
				border-bottom-right-radius: 0;
			}

			.yzmBox .btn {
				cursor: pointer;
				width: 29%;
				background-color: #aa55ff;
				color: #d8d8d8;
				height: 35px;
				outline: none;
				border: 1px solid #aa55ff;
				font-size: 12px;
				border-radius: 6px;
				margin-left: 1%;
				border-top-left-radius: 0;
				border-bottom-left-radius: 0;
			}

			.forgetPwd {
				text-align: end;
				font-size: 12px;
				color: #ffffff;
				padding-right: 5px;
			}

			.loginBtn {
				width: 100%;
				line-height: 36px;
				text-align: center;
				font-size: 15px;
				color: #fff;
				border-radius: 6px;
				background: linear-gradient(to right, #aa55ff, #E45A84);
				outline: none;
				border: none;
				margin-top: 30px;
			}

			.no {
				margin-top: 30px;
				text-align: center;
				font-size: 12px;
				color: #ffffff;
			}
		</style>
	</head>
	<body>
		<!-- 背景 -->
		<div class="background">
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
			<span></span>
		</div>

		<div class="Box">
			<h3>某某管理系统</h3>
			<form action="">
				<input type="text" placeholder="请输入账号" required>
				<input type="password" placeholder="请输入密码" required>
				<div class="yzmBox">
					<input type="text" placeholder="请输入验证码">
					<button class="btn">发送</button>
				</div>
				<p class="forgetPwd">忘记密码</p>
				<input type="submit" class="loginBtn" value="登录"></button>
				<p class="no">没有账号？立即注册</p>
			</form>
		</div>
	</body>
</html>